RTOS Interview Questions Part 6: What is the difference between a binary semaphore and a mutex?
Автор: Embedded Systems Tutorials
Загружено: 2025-06-13
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RTOS Interview Questions Part 6: What is the difference between a binary semaphore and a mutex?
A binary semaphore and a mutex both provide synchronization, but they have key differences:
• A binary semaphore is a signaling mechanism, typically used for task-to-task or ISR-to-task communication. It does not enforce ownership, so any task can give or take it.
• A mutex (mutual exclusion) is specifically designed for resource protection. It enforces ownership, meaning only the task that locks (takes) it can unlock (give) it. Mutexes also support priority inheritance to avoid priority inversion.
In short:
Use a binary semaphore for signaling, and a mutex for resource locking.
#rtos #embeddedinterview #embeddedsoftware #mutex #semaphore #rtostutorial
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